Superposition, Standing Waves & Resonance — Drills · Grade 12 Science
Chapter: Waves, Sound & OpticsWhat these drills covers
By the end of Superposition, Standing Waves & Resonance you should be able to:
- I can combine wave displacements and identify nodes and antinodes.
- I can calculate fixed-string harmonics and explain resonance limits.
2 questions, numeric and written answer, each with a worked explanation.
Vocabulary used: node, antinode, resonance.
Problem 1
Adjacent nodes are .30 m apart. Find wavelength.
Hints
Write the relationship first; substitute with consistent units.
Answer and explanation
0.6 m
Node spacing=λ/2.
Problem 2
Does destructive interference permanently destroy waves?
Answer and explanation
No; it describes local combined displacement. The waves can continue and energy distribution must be considered.
Response criteria
- State a scientifically accurate conclusion.
- Show the calculation or mechanism that supports it.
- Include units, conditions, or limits where relevant.